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Mack 1981 R600 shaft from steering wheel that goes into
Mack 1981 R600 shaft from steering wheel that goes into steering gear box moves up and down when steering wheel is turned,about 1/2 turn of play in steering wheel. … read more
Mike Mcmillan
Mike Mcmillan
Triage Tech/Shop Foreman
Associates
417 satisfied customers
We have a big issue with 12V92 TT,when we start it we are
we have a big issue with 12V92 TT,when we start it we are loosing at least 2 -3 litera of oil from exaust and small pipes on cranckase … read more
Curtis B.
Curtis B.
Technician
Associate Degree
1,571 satisfied customers
I have a Mack RD688 with a Mack T2180 18 speed when I use
I have a Mack RD688 with a Mack T2180 18 speed when I use the splitter on the side of the shifter for DR/UD air never stops coming out of the exhaust port of the shifter when I go to UD … read more
Mike Mcmillan
Mike Mcmillan
Triage Tech/Shop Foreman
Associates
417 satisfied customers
I have an 1998 Mack rd688s. The top half of my fuse Doesn't
I have an 1998 Mack rd688s. The top half of my fuse Doesn't have any power … read more
Daniel Wilson
Daniel Wilson
Auto Mechanics 1&2/diesel mech
4,737 satisfied customers
I got a em6300l mack motor the oil pressure is low what
I got a em6300l mack motor the oil pressure is low what should look for .oil has been changed filters and guage … read more
Mike Mcmillan
Mike Mcmillan
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I have a freightliner with a mercedes mbe4000. Truck started
I have a freightliner with a mercedes mbe4000. Truck started using a gallon of oil in an 8 hour shift and smoking oil smoke. intake manifold hole and exhaust manifold hole soaked in oil and exhaust jo… read more
Curtis B.
Curtis B.
Technician
Associate Degree
1,571 satisfied customers
During regen 2008 mack m mp8 oil comes out breather tube on
During regen 2008 mack m mp8 oil comes out breather tube on drivers side on long run 500 miles used 1to 2 gal oil then some day no oil use have new egr and blower … read more
Mike Mcmillan
Mike Mcmillan
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2006 mack ,mp7 engine. 2007 mack,mp7. 2007 mack,mp7. black
2007 mack,mp7. black smoke only when shifting.do not smoke when idling.there is no air leak turbo is ok no oil visible.on the exhaust manifold there is a small amount of oil coming out. … read more
Mike Mcmillan
Mike Mcmillan
Triage Tech/Shop Foreman
Associates
417 satisfied customers
I need the specs for a mack cylinder balance test. What is
I need the specs for a mack cylinder balance test. What is normal % range for each cylinder... allowable tolerances etc can anyone get me this info?… read more
Mike Mcmillan
Mike Mcmillan
Triage Tech/Shop Foreman
Associates
417 satisfied customers
LOSING POWER. 2006 FRHT 1FUJA6CKX6LW27175. EVEYTHING
LOSING POWER JA: What's the make/model/year of your truck? Engine type? Customer: 2006 FRHT 1FUJA6CKX6LW27175 JA: Are you fixing your truck yourself? What have you tried so far? Customer: YES, EVEYTHI… read more
Daniel Wilson
Daniel Wilson
Auto Mechanics 1&2/diesel mech
4,737 satisfied customers
I have a company truck 2006 columbia cat c13 with 550
I have a company truck 2006 columbia cat c13 with 550 thousand miles. Came in with cracked exhaust manifold. Upon removal of turbo found oil coming out exhaust. I blocked oil supply line and ran the e… read more
Cat Man
Cat Man
Cat Engine Expert
Vocational, Technical or Trade Scho
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I have detroit 12v92 TA in a sportfish. Fresh in-frame
Hi, I have detroit 12v92 TA in a sportfish. Fresh in-frame rebuild , including heads. 12 hrs in, sucked a valve, took out turbo. What would cause a brand new valve to fail on a new motor that appeared… read more
Curtis B.
Curtis B.
Technician
Associate Degree
1,571 satisfied customers
I am working on a mack ch613, it has an E7 engine. engine
I am working on a mack ch613, it has an E7 engine. engine has a miss. I cracked the injector lines at the electric solenoids and #1 and #3 make no difference. I was thinking of swapping two of the sol… read more
Wayne
Wayne
Journeyman
Vocational, Technical or Trade Scho
14,858 satisfied customers
I have a 6bt cummins that was rebuilt and is pouring what I
I have a 6bt cummins that was rebuilt and is pouring what I think is oil out of 4 out of the 6 exhaust ports, the other 2 are wet but not as bad. The engine block was decked and honed by a machine sho… read more
Daniel Wilson
Daniel Wilson
Auto Mechanics 1&2/diesel mech
4,737 satisfied customers
Possible problem with a mack(###) ###-####motor It has used about
Possible problem with a mack(###) ###-####motor It has used about a gallon of oil a day for past 3 years. It now misses. It is the #3 cyc. from cracking the lines to see which cyc it is and it leakl f… read more
spankyjr1
spankyjr1
Retired
Vocational, Technical or Trade Scho
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rd 688s: I have a 03 Mack truck w/427 mac engine. Electrical
I have a 03' Mack truck w/427 mac engine. Electrical problem w/fuel shut off. Either with switch, fuse or breaker. Could it be a computer problem?… read more
Andy
Andy
truck /coach technician
Vocational, Technical or Trade School
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Have a460 mack was spitting and cracking in exhaust put new
Have a460 mack was spitting and cracking in exhaust put new head on had injectors tested now it is slow to open up and has feul showing where exhaust goes together. And the smell of raw feul also low … read more
Daniel Wilson
Daniel Wilson
Auto Mechanics 1&2/diesel mech
4,737 satisfied customers
Hello, we have an inline Detroit Diesel series 671 engine.
Hello, we have an inline Detroit Diesel series 671 engine. We did an inframe overhaul. Reman blower installed also.Problem: at operating temp and full throttle oil is coming out the breather box bolte… read more
Curtis B.
Curtis B.
Technician
Associate Degree
1,571 satisfied customers
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Meet the Experts:

Daniel Wilson

Daniel Wilson

4,737 satisfied customers

Owner at DJ Wilson

Cat Man

Cat Man

Cat Engine Expert

5,234 satisfied customers

I am ASE Master Truck Certified.

Wayne

Wayne

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worked on, Gmc, Macks, Freight liner,Mercedes Benz,,Ford, sterling

Jeremy

Jeremy

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ASE Med/HD Truck Technician, NATEF Diesel Engines and Electrical/Electronics Technician, Network Engineer specializing in CAN faults, Aftertertreatment, and vehicle communications

cumminsdr

cumminsdr

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Curtis B.

Curtis B.

Technician

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Technician turned service manager on multiple lines of trucks and engines, used in industry.

Chris (aka-Moose)

Chris (aka-Moose)

Technician

353 satisfied customers

24 years of experience diagnosing & repairing

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Disclaimer: Information in questions, answers, and other posts on this site ("Posts") comes from individual users, not JustAnswer; JustAnswer is not responsible for Posts. Posts are for general information, are not intended to substitute for informed professional advice (medical, legal, veterinary, financial, etc.), or to establish a professional-client relationship. The site and services are provided "as is" with no warranty or representations by JustAnswer regarding the qualifications of Experts. To see what credentials have been verified by a third-party service, please click on the "Verified" symbol in some Experts' profiles. JustAnswer is not intended or designed for EMERGENCY questions which should be directed immediately by telephone or in-person to qualified professionals.

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